28 September 2026 · Chiropractic

Frozen shoulder (adhesive capsulitis): stages, causes and what helps

A shoulder that slowly gets more painful, then stiffer and stiffer — until reaching a back pocket, doing up a bra, or getting a jacket on feels impossible — is a common story behind the words frozen shoulder. The medical name is adhesive capsulitis. It can be frustrating and slow, but the usual long-term outlook is reassuring: most frozen shoulders get better over time. This article rounds out our shoulder series, following rotator cuff injuries, sprains and calcific tendinitis and labrum tears (SLAP and Bankart). It explains what happens inside the joint, the typical stages, who tends to get it, how it differs from a rotator cuff problem, and how conservative care, medical options and patience fit together.

This article is for education only and is not a diagnosis or a personal treatment plan. Shoulder pain with chest pain or shortness of breath, fever with a hot swollen joint, a deformed shoulder after a fall, sudden arm weakness or unexplained weight loss needs prompt medical care — see the red-flag list below.

What frozen shoulder is

The shoulder (glenohumeral) joint is a ball-and-socket: the head of the humerus (upper arm bone) sits against the shallow glenoid socket of the shoulder blade. Around the joint is the joint capsule — a sleeve of strong connective tissue lined with synovium, which makes the fluid that keeps the joint gliding. In a healthy shoulder the capsule is roomy, with a loose fold at the bottom called the axillary recess. That slack is what lets the arm rise overhead.

In frozen shoulder, the capsule becomes inflamed, then thickens, stiffens and tightens. AAOS OrthoInfo describes thick bands of tissue (adhesions) forming and, in many cases, less synovial fluid in the joint. Mayo Clinic describes the same picture: the capsule thickens and tightens around the joint and restricts movement. The NHS puts it simply — the tissue around the joint becomes inflamed, then gets tighter and shrinks.

The key feature is that motion is lost both actively and passively. “Active” range is how far you can lift or turn the arm yourself; “passive” range is how far a clinician can move it for you while your muscles relax. OrthoInfo and Mayo Clinic both describe frozen shoulder as limiting both. Because the tight capsule is the block, no amount of effort — yours or someone else’s — gets the arm much further in the stiff phase. Clinical guidelines also note that loss of external rotation (turning the forearm outward with the elbow at your side) is one of the earliest and most characteristic signs.

Why the capsule reacts this way is not fully understood. OrthoInfo notes no clear link to arm dominance or occupation. Sometimes it appears with no obvious trigger (often called primary or idiopathic frozen shoulder); sometimes it follows a period of reduced movement or sits alongside a medical condition (secondary frozen shoulder).

The three stages: freezing, frozen, thawing

Frozen shoulder is classically described in three overlapping stages. The timeframes below come from the cited sources — notice that they do not match exactly, because the course genuinely varies from person to person. Treat them as broad ranges, not a schedule.

Stage 1 — Freezing

Pain builds gradually and range of motion starts to shrink. Pain is often worse with movement and at night, and it can disturb sleep. Mayo Clinic gives this stage as typically about 2 to 9 months; OrthoInfo gives anywhere from 6 weeks to 9 months.

Stage 2 — Frozen

Pain may ease, but stiffness remains or worsens, and daily tasks (hair, dressing, reaching up to a shelf or behind the back) can be hard. OrthoInfo describes this stage as around 4 to 6 months; Mayo Clinic says 4 to 12 months.

Stage 3 — Thawing

Movement slowly returns. OrthoInfo says a return to normal or close-to-normal strength and motion typically takes anywhere from 6 months to 2 years; Mayo Clinic gives about 5 to 24 months for this stage.

The big picture: Mayo Clinic says symptoms typically improve within 1 to 3 years, and OrthoInfo notes full recovery may take up to 3 years. The NHS is similarly frank that it can take months or years — but that the pain and stiffness usually go away eventually. Some people keep a little residual stiffness. Knowing the typical arc helps set expectations: early care focuses on calming pain, and the stiff phase is about keeping what you have and gently gaining more.

Who tends to get frozen shoulder

• Age and sex. OrthoInfo says it most commonly affects people between 40 and 60, and women more often than men. Mayo Clinic similarly notes that people 40 and older, particularly women, are more likely to have it.
• Diabetes. OrthoInfo notes frozen shoulder occurs much more often in people with diabetes, and that stiffness in people with diabetes tends to be greater and to last longer before thawing. The NHS also lists diabetes as a cause and stresses keeping up with regular diabetes check-ups.
• Thyroid disease. Both overactive (hyperthyroidism) and underactive (hypothyroidism) thyroid conditions are associated, per OrthoInfo and Mayo Clinic. Clinical guidelines suggest diabetes and thyroid function should be considered in anyone with a primary stiff shoulder.
• After immobilization. Keeping the shoulder still for a long time — after surgery, a fracture, a rotator cuff injury or a stroke — raises the risk (Mayo Clinic, OrthoInfo, NHS). This is one reason clinicians encourage safe early movement after injury or surgery.
• Other conditions linked in these sources include cardiovascular disease and Parkinson’s disease.

None of these means frozen shoulder is inevitable; OrthoInfo points out it can happen to anyone.

How frozen shoulder differs from a rotator cuff problem

Rotator cuff tendinopathy and tears (covered in our shoulder injuries article) are far more familiar causes of shoulder pain, and early on the two can look alike. Clinical guidelines specifically warn that pain with only end-range loss in the early freezing stage can be confused with cuff tendinopathy. A few features help separate them:

• Passive vs active range. In frozen shoulder, passive motion is lost as well as active motion — the joint is mechanically tight. In many rotator cuff problems, passive range is typically much better preserved: the arm may be hard or painful to lift on your own, yet a clinician can often move it further while you relax.
• External rotation. A marked loss of external rotation with the arm at the side is a hallmark of frozen shoulder, and it is one of the main motions tracked in trials.
• Global stiffness. Frozen shoulder tends to restrict movement in several directions (lifting forward, out to the side, rotating in and out), not just one painful arc.
• Strength. Guidelines note rotator cuff strength is relatively unaffected in frozen shoulder, whereas true weakness — especially sudden weakness after a fall — points more toward a cuff tear.

Labral problems are different again: they are more about catching, clunking or instability after trauma or overhead sport than a steadily stiffening joint (see shoulder labrum tears). The shoulder can also have more than one issue at once, which is why assessment matters more than labels.

How it is assessed

Frozen shoulder is mainly a clinical diagnosis — based on the story and the exam rather than a scan.

• History. How it started (gradual vs after an injury), night pain, which tasks are hard, recent immobilization or surgery, and health conditions such as diabetes or thyroid disease.
• Active vs passive range. OrthoInfo and Mayo Clinic both describe the clinician comparing how far you can move the arm yourself with how far it moves when the clinician moves it — in frozen shoulder, both are limited. External rotation is checked carefully.
• Neck and strength screen. Referred pain from the neck, nerve involvement and cuff strength are checked so other causes are not missed.
• Imaging — usually to rule other things out. Mayo Clinic notes frozen shoulder can usually be diagnosed from symptoms, with X-ray, ultrasound or MRI used to rule out other conditions. OrthoInfo says MRI and ultrasound are not required to diagnose it but can identify problems like a rotator cuff tear; X-rays can show arthritis. Guidelines describe plain X-rays as essentially normal in primary frozen shoulder, which is useful in itself because it helps exclude arthritis, calcific tendinitis or other bony causes.

Your family doctor may also check blood sugar or thyroid function if there is reason to, since optimizing those conditions is part of the plan.

Conservative care: what helps

OrthoInfo describes physical therapy focused on shoulder flexibility as the primary treatment recommendation, and notes most people improve with relatively simple treatments to control pain and restore motion. The approach changes with the stage: calm things down while it is painful; gently and consistently work on range as it stiffens and thaws.

Chiropractic care and joint mobilization

At Rupert Health Centre, chiropractic care for a frozen shoulder is gentle and paced. It typically includes joint mobilization of the shoulder within tolerance (slow, graded movements of the ball in the socket, not forceful cranking), work on the shoulder blade, mid-back and ribs so the whole chain moves better, and coaching on a home program. Clinical guidelines caution that vigorous mobilization during the intensely painful freezing stage can aggravate inflammation, so early sessions stay light and later sessions progress as pain allows.

We try to be honest about the evidence. A Cochrane review (Page et al., 2014) found that manual therapy combined with exercise probably gives less short-term improvement than a corticosteroid injection, with differences between treatments mostly fading by six to twelve months, and much of the evidence was low quality. In other words, hands-on care and exercise are reasonable parts of a plan — especially for keeping motion and confidence — but they are not a quick fix, and they sit alongside medical options rather than replacing them.

Massage therapy

Registered massage therapy can help with the muscle guarding and tension that build up around a stiff, painful shoulder — the upper trapezius, pecs, and the muscles around the shoulder blade and neck that work overtime when the joint won’t move. Many people find it helps with comfort and sleep and makes home exercises easier to do. It won’t directly “release” a contracted capsule, so we pair it with mobility work rather than using it alone.

Gentle home mobility exercises

Mayo Clinic, OrthoInfo and the NHS all emphasize regular, gentle range-of-motion work. The rule of thumb: a gentle stretch, not sharp pain. A little discomfort that settles quickly is usually fine; pain that lingers for hours or worsens night pain means ease off. Warmth before stretching (a warm shower or heat pack) helps many people. Ask your clinician how many repetitions suit your stage.

• Pendulum. Lean forward with your good hand on a table and let the sore arm hang. Gently sway your body so the arm swings in small circles or back and forth. Let gravity do the work; keep the shoulder relaxed.
• Table slides. Sit beside a table with your forearm resting on a towel. Slowly slide the hand forward as you lean your trunk forward, then return. This gives forward elevation with minimal muscle effort.
• Assisted forward lift (lying down). Lie on your back, hold the wrist of the sore arm with your good hand and gently lift the arm overhead until you feel a mild stretch, then lower slowly (OrthoInfo describes this supine flexion stretch).
• External rotation with a stick. Lying or sitting, keep the sore elbow tucked at your side, bent to 90°. Hold a light stick, cane or broom handle in both hands and use the good arm to push the sore hand gently outward. Hold briefly, then return. (OrthoInfo describes a similar doorway external-rotation stretch.)
• Towel stretch. Hold a towel behind your back, sore hand at the bottom, good hand over the opposite shoulder. Use the top hand to gently draw the sore hand upward to work on reaching behind your back.
• Cross-body stretch and finger walk. Gently draw the sore arm across the chest with the other hand (OrthoInfo), or walk your fingers slowly up a wall (Mayo Clinic).

Short, frequent sessions tend to be easier on a sore shoulder than one long, forceful one. The NHS advises not to invent your own strenuous exercises or push through gym equipment, which can make pain worse — and also notes that keeping the shoulder completely still makes it worse too. Keep using the arm for everyday tasks within comfortable limits.

Pain management

• Heat or cold. Mayo Clinic notes either can help relieve pain; the NHS suggests a wrapped heat pack for up to 20 minutes at a time.
• Over-the-counter medicines. The NHS suggests paracetamol (acetaminophen) first, then an anti-inflammatory such as ibuprofen if needed and appropriate. Check with a pharmacist or your doctor about what is safe for you, especially with stomach, kidney or heart conditions.
• Sleep positioning. Avoid lying on the sore side; a pillow under or in front of the arm can keep it supported.
• Manage related health conditions. OrthoInfo notes that improving diabetes control with your doctor can help recovery.

Patience (really)

The most honest part of frozen shoulder care is that time is on your side, even if it doesn’t feel like it. The goal of conservative care is to keep you as comfortable and functional as possible while the condition runs its course, and to make the most of the thawing phase when it arrives.

When to see your family doctor or a specialist

We work alongside family doctors, sports physicians and orthopaedic surgeons. Ask your MD about referral or further options if:

• The diagnosis is unclear or imaging is needed — for example to rule out arthritis, a rotator cuff tear or calcific tendinitis.
• Pain is severe or not settling — especially constant night pain despite simple measures. The NHS advises seeing a GP if pain and stiffness do not go away or the pain makes it hard to move your arm.
• A corticosteroid injection may help. Mayo Clinic notes injections into the joint may lessen pain and improve movement, especially early. A 2020 systematic review and meta-analysis in JAMA Network Open (Challoumas et al.) found intra-articular corticosteroid was the only treatment with clear short-term superiority for pain and function, and suggested early injection combined with a home exercise program in shoulders with symptoms of less than a year.
• Hydrodilatation is being considered. OrthoInfo and Mayo Clinic describe hydrodilatation (also called arthrographic distension) as an image-guided injection of a larger volume of sterile fluid to stretch the capsule, sometimes combined with steroid. A Cochrane review (Buchbinder et al., 2008) found short-term benefits in pain, range and function with saline-and-steroid distension, but it was uncertain whether it beats other options.
• Symptoms persist despite a fair trial of conservative care. For a small number of people, surgeons may discuss manipulation under anaesthesia or arthroscopic capsular release. Mayo Clinic describes surgery for frozen shoulder as rare.

Red flags — seek urgent care

• Shoulder or arm pain with chest pain, pressure, shortness of breath, sweating or nausea — call 911. Left shoulder or arm pain can come from the heart (see our note on heartburn vs heart attack).
• Fever, or a hot, red, swollen joint, or feeling generally unwell — possible infection; seek same-day medical care.
• Trauma with deformity, a shoulder that looks out of place, or severe pain after a fall — emergency assessment for fracture or dislocation.
• Sudden weakness — inability to lift the arm after an injury, or new weakness, numbness or tingling in the arm or hand (and especially facial droop or speech changes) — urgent assessment.
• Unexplained weight loss, a history of cancer, or relentless pain unrelated to movement or position — prompt medical review.

These are not typical of frozen shoulder, which is why they need checking by a doctor rather than waiting it out.

How this fits at Rupert Health Centre

At our East Vancouver clinic on Kingsway, a frozen-shoulder visit starts with a careful history, active and passive range testing, a neck and strength screen, and a conversation about which stage you seem to be in. From there, care is usually a mix of gentle joint mobilization, soft-tissue work or massage, and a simple home program you can actually keep up with. We will tell you if something doesn’t fit the pattern, and we are happy to coordinate with your family doctor about imaging, injections or hydrodilatation when those make sense. Shoulder stiffness that began after a car crash may be covered through ICBC where appropriate; see our ICBC FAQ.

Related reading: Shoulder injuries: rotator cuff, sprains and calcific tendinitis · Shoulder labrum tears: SLAP, Bankart, and what they mean.

References

1. American Academy of Orthopaedic Surgeons (OrthoInfo). Frozen Shoulder (Adhesive Capsulitis). https://orthoinfo.aaos.org/en/diseases--conditions/frozen-shoulder/
2. Mayo Clinic. Frozen shoulder — Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/frozen-shoulder/symptoms-causes/syc-20372684
3. Mayo Clinic. Frozen shoulder — Diagnosis and treatment. https://www.mayoclinic.org/diseases-conditions/frozen-shoulder/diagnosis-treatment/drc-20372690
4. NHS. Frozen shoulder. https://www.nhs.uk/conditions/frozen-shoulder/
5. Page MJ, Green S, Kramer S, et al. Manual therapy and exercise for adhesive capsulitis (frozen shoulder). Cochrane Database Syst Rev. 2014;(8):CD011275. https://www.cochrane.org/evidence/CD011275_manual-therapy-and-exercise-frozen-shoulder-adhesive-capsulitis
6. Buchbinder R, Green S, Youd JM, et al. Arthrographic distension for adhesive capsulitis (frozen shoulder). Cochrane Database Syst Rev. 2008;(1):CD007005. https://www.cochrane.org/evidence/CD007005_arthrographic-distension-adhesive-capsulitis-frozen-shoulder
7. Challoumas D, Biddle M, McLean M, Millar NL. Comparison of treatments for frozen shoulder: a systematic review and meta-analysis. JAMA Netw Open. 2020;3(12):e2029581. https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2774247
8. Pandey V, Madi S. Clinical guidelines in the management of frozen shoulder: an update! Indian J Orthop. 2021;55(2):299–309. https://pmc.ncbi.nlm.nih.gov/articles/PMC8046676/

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